Aset of propositions is consistent if there is an assignment of truth values to each of the variables in the propositions that makes each proposition true. is the following set of propositions consistent?

(a) the system is in multiuser state if and only if it is operating normally.
(b) if the system is operating normally, the kernel is functioning.
(c) the kernel is not functioning or the system is in interrupt mode.
(d) if the system is not in multiuser state, then it is in interrupt mode.
(e) the system is in interrupt mode.

Complete the sentence about a presentation delivery method

Which company provides a crowdsourcing platform for corporate research and development? a: mtruk b: wiki answers c: mediawiki d: innocentive

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?